Crimson Shards , aka Fiendshard, Red Khaladrean Crystal
Crimson shards are found beneath the earth near layers of magma or sulfur vents, typically growing on volcanic cavern walls. They are found in Golarian but are particularly located in areas of known fiendish activity, where evil outsider energy (demons, devils, Hells, Lower Planes) has been active. Crimson shards have a dark red to bright red appearance, with writhing crimson-black veins running through them. They are sometimes known as fiendshards. Crimson shard items have an affinity for binding, evil, and fiendish magic. Psionacists do not use fiendstones as they find the energy to draining and corrupting to work with , though those that dable in the dark aspects of psionics have been rumored to value them.
Recently it has been discovered that Formians have begun using them to augment their powers and to create strange insectile abominations. They maybe responsible for employing these techniques for the Red Hand Of Doom armies appearing in the north of Andoran in the area known as Alyria. Rumors suggest that orcs and other creatures have been psionically mutated with the corrupting power of the crystals.